99% Pure Tetramethylguanidine
High-purity tetramethylguanidine (99%) used in pharmaceutical intermediate synthesis, classified under HTS 2925.29.70.00 as a separate chemically defined imine derivative. Meets Chapter 29 requirements for organic compounds without excluded additives. Common in organic catalysis applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If part of heterocyclic compound mixture
If structure interpreted as heterocyclic, moves to Chapter 29 heading 2933; imine-function takes precedence.
If classified as organic derivative with sugar function
Sugar ethers/esters excluded to Chapter 29 heading 2940 per chapter exclusions.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide GC-MS analysis confirming ≥99% purity to distinguish from 'other' imines
• Ensure stabilizer (if present) qualifies under note (f) for preservation only
• Avoid retail packaging over 1kg to prevent Chapter 38 reclassification
Related Products under HTS 2925.29.70.00
Tetramethylguanidine (TMG)
Tetramethylguanidine is a strong organic base classified under HTS 2925.29.70.00 as an imine-function compound and derivative. It features a guanidine structure with four methyl groups, making it a chemically defined compound fitting Chapter 29 note (a). Primarily used as a catalyst in chemical synthesis.
Industrial Grade Tetramethylguanidine
Tetramethylguanidine in industrial grade (95-98% purity) for use as catalyst in polymerization reactions, under HTS 2925.29.70.00. Qualifies as chemically defined organic imine per Chapter 29 scope, with minor impurities allowed. Key in polyurethane production.
Tetramethylguanidine with Stabilizer
Stabilized tetramethylguanidine containing BHT preservative for transport, classified HTS 2925.29.70.00 per Chapter 29 note (f). Remains chemically defined imine compound. Used in fine chemical manufacturing.
Pharma-Grade Tetramethylguanidine Base
Pharmaceutical-grade tetramethylguanidine meeting USP standards, under HTS 2925.29.70.00 as imine derivative. Chemically defined for drug synthesis intermediates. Excludes immunological products per chapter note.